Land Rover Repair: 1998 range rover transmission, extreme ambient temperatures, automatic gearbox

Question
i would like to know the proper way to check the transmission fluid, im getting different readings.

Answer
Direct from the owners manual:

NOTE: If it is necessary to check the oil level
The automatic gearbox fluid must ONLY be
checked when the engine and gearbox are
COLD, (see ’note’ below)
Ensure the car is resting on level ground, then
select ’P’ (park) and start the engine.
With the engine running at idle speed and
both footbrake and handbrake applied, move
the selector lever to position ’1’ and then back
to position ’P’.
With the engine running, withdraw the
dipstick from the filler tube and wipe the blade
clean. Reinsert the dipstick fully and withdraw
again to check the level. Top-up to maintain
the level between the upper and lower
markings on the dipstick with a fluid meeting
the minimum specification defined in ’General
data’.
NOTE: In extreme ambient temperatures, the
level of fluid showing on the dipstick will vary.
To ensure an accurate reading, the level
should be checked at an ambient temperature
of 68°F (20°C).
DO NOT OVERFILL!